Call me crazy, but I don't see how this is going to reduce lag. You're replacing physics collision calculations with % proc calculations, several of them.
Isn't this just going to make it worse?
Remember, I'm no coder so I don't fully know the implications, but it just doesn't feel like it's going to fix anything, to me. It also will reduce twf damage across the board, while simultaneously not fixing the problem.
Feel free to explain to me why I'm wrong, if I am.